package ex02.pyrmont;

import ex02.pyrmont.Request;

import javax.servlet.ServletOutputStream;
import javax.servlet.ServletResponse;
import java.io.*;
import java.util.Locale;

/**
 * @author: 顶风少年
 * @Description:
 * @date: 2023/4/28
 **/
public class Response implements ServletResponse {
    private static final int BUFFER_SIZE = 1024;
    Request request;
    OutputStream output;
    PrintWriter writer;

    public Response(OutputStream output) {
        this.output = output;
    }

    public void setRequest(Request request) {
        this.request = request;
    }

    //从request获取用户需要的文件,然后从静态目录
    public void sendStaticResource() throws IOException {
        byte[] bytes = new byte[BUFFER_SIZE];
        FileInputStream fis = null;
        try {
            File file = new File(Constants.WEB_ROOT, request.getUri());
            if (file.exists()) {
                fis = new FileInputStream(file);
                //将静态资源中的数据读取
                StringBuilder sb = new StringBuilder();
                int ch = fis.read(bytes, 0, BUFFER_SIZE);
                while (ch != -1) {
                    sb.append(new String(bytes, 0, ch));
                    ch = fis.read(bytes, 0, BUFFER_SIZE);
                }
                //拼接上静态资源
                String message = "HTTP/1.1 200 OK\r\n" +
                        "Content-Type: text/html\r\n" +
                        "\r\n" +
                        sb.toString();
                //写入客户端
                output.write(message.getBytes());
            } else {
                //文件不存在返回错误信息
                String errorMessage = "HTTP/1.1 404 File Not Found\r\n" +
                        "Content-Type: text/html\r\n" +
                        "Content-Length: 23\r\n" +
                        "\r\n" +
                        "<h1>File Not Found</h1>";
                output.write(errorMessage.getBytes());
            }
        } catch (Exception e) {
            System.out.println(e.toString());
        } finally {
            if (fis != null) {
                fis.close();
            }
        }
    }

    @Override
    public PrintWriter getWriter() throws IOException {
        writer = new PrintWriter(output,true);
        return writer;
    }

    @Override
    public String getCharacterEncoding() {
        return null;
    }

    @Override
    public String getContentType() {
        return null;
    }

    @Override
    public ServletOutputStream getOutputStream() throws IOException {
        return null;
    }


    @Override
    public void setCharacterEncoding(String s) {

    }

    @Override
    public void setContentLength(int i) {

    }

    @Override
    public void setContentLengthLong(long l) {

    }

    @Override
    public void setContentType(String s) {

    }

    @Override
    public void setBufferSize(int i) {

    }

    @Override
    public int getBufferSize() {
        return 0;
    }

    @Override
    public void flushBuffer() throws IOException {

    }

    @Override
    public void resetBuffer() {

    }

    @Override
    public boolean isCommitted() {
        return false;
    }

    @Override
    public void reset() {

    }

    @Override
    public void setLocale(Locale locale) {

    }

    @Override
    public Locale getLocale() {
        return null;
    }
}
